摘要: |
基于Welch内积定理(IC定理),导出了归一化零时延互相关函数或零时延内积的绝对最大
值δ0
的三条基本特性,从而把Welch内积定理演变成了适用于计算量较小、解扩增益较高、有峰
值、无旁瓣的δ相关解扩的扩频码检验方法,即“实用Welch内积定理-扩频码检验方
法
”,为作者拟定的“δ/θ型基带相关检测/解扩方案”(电讯技术,2012,52(9):1438
-1442)的工程应用奠定了扩频码检验与设计的理论基础。这两个检验方法与现存经典(含We
lch)扩频码检验方法在参数、结构、判决方式等方面都不相同。 |
关键词: 扩频码检验 Welch内积定理 实用Welch内积定理-扩频码检验 δ 相关解扩 |
DOI: |
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基金项目: |
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Spread-spectrum code test method for δ-correlation despreading |
LONG De-hao,CHEN Zhi-qing |
() |
Abstract: |
Based on Welch IC theorem, the three basic characteristics
of the absolute maximum values δ0 of the normalized zerodelay cross
correlation values or zerodelay inner products are derived, thereby, the Wel
ch inner products theorem is developed into a practical spreading code test meth
od,which is called Welch inner products theoremspreading code test method
,for δcorrelation despreading with less computation,higher despreadi
ng gain,a peak,and no sidelobe, in order th
at the spreading codes test and design theoretical foundation for “δ/θ ba
se b
and correlation detection/despreading scheme” proposed by the authors in Teleco
mmunication Engineering(201
2,52(9):1438-1442) has been built. The difference
s between the two test methods and the existing classic (including Welch) test m
ethods for spreading codes are that their parameters, structure, deci
sion rule and so on are not the same. |
Key words: spreading code test Welch inner products theorem practical Welch inner products theorem spreading code test δ-correlation despreading |